Electrical insulator



tscpr. 11, 192s. 1,684,312

J. J. FISCHER EFAL ELECTRICAL INSULATOR Filed Jn. i9. 1926 gwwnkof,

ll M1441 Patented sept. 1.1, legs.

UNITED STATE,S 'PATENT oF FICE;

JOHN J. FISCHER, F MARION, L .INDIANA, AND WARREN R. PAYNE, or DENOYA,

OKLAHOMA.

ELECTRICAL INSULA-roR.

.This invention relates to electrical insulators, and .has for one ofits objects the provision of a device of this character which shall beprovided Withfan opening for t-he v reception -of the wire and slots topermit the Vwire to be inserted in and withdrawn from the opening, thearrangement of the slots with respect to eachother and the openingvbeing novel and such that, while the wire may be readily insertedinland withdrawn from the opening, it is positively held againstaccidental displacement therefrom. I With the foregoing and otherobjects `1n view, thel invention consists of the construction,combination andY arrangement of parts hereinafter fully described andclaimed, and illustrated in the accompanying drawing, wherein: v v

Figure 1 is a view .i'n side'elevation of an electrical insulatorembodying our invention, p i

Figure 2 is a similar view looking at the opposite side of theinsulator,

Figure 3 is a similar View insulator from a third sidethereof,l

F igure 4 is a detail sectional view taken on the planeindicated by theline' 4-4 of Figure 1, and l Fi re 5 is an elevational Viewl of amodified orm of the insulator.

' Corresponding' and like parts are referred to in the vfollowingdescription, and desigv"nated in the several views of the accompanyingdrawing, by similar reference characters.

The insulator 1 may be made of glass, porcelain yor other suitable'material, and is provided in itsinner end with a threaded socket 2 topermitof its application to apin mounted on a cross arm or othersupport. The insulator 1 is provided adjacent its outer end with anopening 3 which. extends diametrically therethrough and is provided forthe reception of the wire. A slot 4 extending axially of the insulator1' and opening out through opposite sides thereof, is' arranged at rightangles with respect to the opening 3,

'i -""""and extends from the outer end of -theinv Sula. or to a pointinwardly beyond the open- Y l Slots 5 arranged atopposite sides ofthelookip g at ythe slot: and communicating therewith, incline inwardly andlaterally in opposite directions from the opening 3. 'The slots 5 openout through opposite sides of the insulator -l, and I their 'open endsare in alinement with the inner end of the slot 4.-'

The insulator shown in Figures 1-4 is especially adapted for outsideuse, while the insulator shownj in Figure 5 is especially adapted forindoor use. rlfhis latter insulator provided at its inner end `with anattachlng screw 6, and to permit the ready 'application of the` screwthe insulator is made of similar sections. The insulator sections lIland ll are preferably of semi-cylindrical formation, and are v'provided'in their inner sides and adjacent their inner ends with recesses 7 forthe reception ofthe head 8 of the screw 6. The screw head 8 is providedwith small projections 9 which lit in'corresponding vindentations in thewalls of the recesses 7 and prevent the insulator and screw from `havingrelative axial movement. The insulator sections 1a and 1b are securedtogetherv by boltslO, the heads and nuts of-which are embedded in thesides of the sections.

The wire may be readily inserted in the opening by first carrying itvinto the slot A. until it contacts with the inner or'bottom wallthereof, then turning it until itl is in parallel relation to the slots5, and by thence moving it outwardly in the slots 5. As the slots 5incline inwardly and laterally in op-l they are in fplanes right'angularly related to the plane o the slot 4, .there is no possibilityposite directions from the opening 3 and as of the wire accidentallyleaving the opening 3.

- It should be understood that the-drawing is merely illustrative anddoes not pretend toglveex'act proportions. Furthermore, thesaidgdrawingl is illustrative 'of a preferred construction, it being ourexpectation that f I various changes and modifications may be madewithout departing from the spirit and l Scope of the-invention.

' What is claimed is :f 'Antinsplator having a diametrical wirereceiving opening, an axial slot arranged at right angles to the openingand extending the ends o'said opening to the inner ends out thronghopposite sides of the insulator, of the slot. said slot extending fromthe outer end of the In testimony whereof we aix our signa- 10 insulatorto a point inwardly beyond the tures.

l 5 opening, and slots arranged 'at opposite sides of the first namedslot and extending inward- JOHN J. FISCHER. ly and laterally in oppositedirections from WARREN R. lAYNE.

